AN ENUMEKATION OF CULTIVATED PEENS. 



187 



stramineous; ultimate pinnules and lobes oblong-elliptical, 

 cuneiform, marginate, usually oblique. Veins pinnately forked,, 

 radiating ; venules direct, apices of the sterile clavate, free, the- 



Genus 94. Portion of frond, natural size; two ditto, enlarged. No. 1. 



fertile 2-4 converging and transversely combined by a thick 

 impressed, sporangiferous marginal receptacle. Sori oblong, 

 rarely two on each lobe. Indusium formed of the reflexed 

 margin, thick, coriaceous. 



1. O. pallens, /. 8m. Gen. Fil (1841) ; Hook. Sp. Fil 2, t. 77 ; 

 Hook, et Bauer. Gen. Fil. t. 106 A. Adiantum 

 pallens, Sw. Mauritius. 



95. ONYCHIUM, Kaulf. 



Vernation fasciculate and decumbent, or distant and sarmen- 

 tose, Fronds decompound multifid, 13 feet high, smooth ; 

 sterile segments cuneiform. Veins forked, free, their apices 

 clavate ; fertile segments linear, apiculate, veins simple, short, 



